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Finding the Fourth Proportional to 472.60, 652.10 and 398.76

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Solution

The fourth proportional to 472.60, 652.10 and 398.76 is: 550.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.60 : 652.10 = 398.76 : x
  2. Step 2: Convert to fraction form
    472.60/652.10 = 398.76/x
  3. Step 3: Cross multiply
    472.60x = 652.10 × 398.76
  4. Step 4: Simplify right side
    472.60x = 260,031.40
  5. Step 5: Solve for x
    x = 260,031.40/472.60
  6. Step 6: Final answer
    x = 550.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.